Sweating helps cool the body.
When you are dehydrated, your ability to replace the fluid lost through sweating becomes limited. During exercise or hot weather, this can increase the risk of heat-related illness.
Dehydration can contribute to:
Heat cramps
Heat exhaustion
Heatstroke
Mayo Clinic identifies heat injury as a potential complication when fluid losses are not replaced.
Severe Dehydration Can Become Dangerous
Severe dehydration is much more than simply feeling thirsty.
If too much fluid is lost, blood volume can fall significantly. This can reduce blood pressure and limit the amount of oxygen reaching organs.
One of the most serious complications is hypovolemic shock, which can be life-threatening.
Electrolyte disturbances can also become severe enough to cause seizures or loss of consciousness.
Who Is Most at Risk?
Anyone can become dehydrated, but some people are more vulnerable.
Older Adults
Older adults often have a smaller fluid reserve and may experience a reduced sense of thirst. Certain illnesses and medications can increase the risk further.
Babies and Young Children
